Knockdown form for the construction of concrete bins.



JQHLREBVBS. KNOGKDOWN FORM FOR THE CONSTRUCTION OF CONCRETE BINS.

APPLICATION IILED'DEO. 11.1907.

Patented Dec. 29

A "UNITED STATES PATENT OFFICE- JOHN H. nnnvnsyoronnuen, CALIFORNIA.

xnocxnowu ronM iron 'rnn cous'rauo'riou or con'oanrn sins.

No.907,878. a

To all whom it may concern:

Be it known thatI, JOHN H. REEVES, a citizen of the United States, residing at Orange, in the county of Qrange and State of California, have invented certain new and useful Improvements in Knockdown Forms .for theConstruction of Concrete Bins; and I do-hereby declare the following to be a full, clear, and exact description-of the invention,

' 0 suchas will enable others. skilled in the art to which it appertains to rnake and use the same..,. My invention has for its-object toprovide a convenient knock-down or sectional form- I 15. for use in'the'constructioh of barns, silos,

storage bins andthe like, in monolithic concrete, and to the above ends the invention consists of the novel devicesand com-bina'- tions of devices hereinafter described and 2o defined in the claims.

The invention is illustrated in the accompanying drawings, wherein like characters indicate like parts throughout the several views.

Referring to the drawings, Figure 1 is a view, partly'in side elevation and partly in vertical section, showing the improved knock-down'form. set up, some parts being broken away; and Fig. 2 is a view, partly in plan'and partly in horizontal section, of the parts shown in Fig. 1, portions being broken roof form made up of radially diverging secf tions detachably secured together.

Theus'ections of the inner cylindrical shell are indicated by the numeral 1, and the sections of the outer cylindrical shell are indicated by the numeral 2. The sections 11 that make up a circumferential series'have. overlapped ends and, at'their upperedges, they overla the inside surfaes of similar sections 1' t at are higher up. Ina-similar Application filed December 11, 1907. Serial K014163539? manner the sections 2 that. make up. it; circumferential series in the outer cylindrical Specification of Letters Patent-i Patented Dec. 29, 190 8.

' shell'overlap thev outside surfaces of the lower extremities of'upper cylinder sections 2. This brings the concentrically spaced horizontally alined inner-shell segment 1 and outer shell segment 2 'ofjthe several circumferential series successively closer and closer together toward the top of the bin, so that the thickness of the Wallof the bin willbe gradually decreased in a directionfrorn the bottomtoward the top of the bin. 'lhisfas is evident, is very desirable construction.

Neartheir lower edges the inner shell Segments 1 are provided with pivoted hooks 3 that overlap the inner surfaces of the upper edges of lower sections 1 and interlock with studs or projections 4 on the latter. In a similar manner the outer shell-segments 2 are provided, near their lower edges, with pivoted hooks 5'that overla the outer surfaces 1 of the upper edges of the ower sectionsz and projections 6 on the interlock with studs or latter. Preferably spacing blocks"? are interposed at suitable intervals between the sections of the inner and outershells, and nutted bolts 8 are passed through the overlapped-edges of the sections of the inner and outer shel s.-. V

.To provide a form upon which the roof of. the silo or bin may be constructed, I rovide the sectional conical roof form 9 w ich is made up of-a multiplicity of radially projecting segments adapted, as shown, to be securely but detachably connected. by hooks 10 on said sections that are engaged'with studs or projections 11 on the adjacent sections, as shown in Fig. 2.

The margin of the conical form made up of the sections 9 is provided with a downturned flange adapted to engage over the upper edges of the upper'series of inner shell segments 1'. At their upper edges the uppermostoutside shellsegments 2 are provided with outwardly offset and up-turned flanges 2? that are adapted to form a projecting annular eave around the concrete top of the bin or silo.

In the use of the device above described,

'the circumferential series of inner andouter segmentalshells 1 are preferably built u in succession, and the interveningyspace ed with concrete before the next upper series of inner and outer segmental shells' are applied. Also the spacing blocks 7 are prefera y re moved when the concret has been filled in nearly up to the same. he bolts 8 should be removed after the concrete has set but beliore it becomes thoroughly hardened. As is removed from the same.

evident, after the completed concrete bin, barn or silo has been formed, the inside and outside se 'mental shells and the sections of the conicsii roof form may be disconnected and removed, individually, from working positions;

It will, of course, be understood that the bin or silo will be provided with the usual or suitable passages or door openings which will enable material to be placed within and to be The sections of the interior shell, when removed from working position, may be removed from the silo through one or the other of said openin s.

It will be noted that the hoo (s 3 and the lower edges of the inner sections 1 to which they are pivoted straddle the upper edges of the engaged lower sections 1 and thereby limit the downward movements of upper sections in'respect to lower sections. he same statement is true in respect to the outer hooks 5 and sections 2 to which they are pivoted.

The character 2 indicates the concrete which forms the bin or silo.

It will be understood that the rinciples of construction involved in the mock-down form above described may be employed in rectangular and polygonal construction.

What I claim 1s:

1. A knock-down form for the construe.- tion of concrete bins, barns and silos, comprising interior and exterior shells in parallel arrangement, each made up of several circumferentially extended series of cylindrical segments, overlapped and detachably connected together, the sections of said interior and exterior shells being successively oilset in a vertical direction and spaced closer and closer together in a direction from the bottom toward the top of the structure, substantially as described.

2. In a knock-down form for the construction of concrete bins, barns and silos, the

combination with an inner shell made up of several circumferential series of overlapped cylindrical segments, the upper segmental sections having hooks 3 that engage projections 4 on the lower sections, of an outer shell made up of several horizontal series of overlapped segmental sections 2, the upper sections 2 having hooks 5 that engage projections 6 on the lower sections, the horizontall horizontal series of the inner and outer shells being placed successively closer and closer together in parallel arrangement, and nutted bolts 8 passed through the overlapped edges of the inner and outer sections 1 and 2 and adapted to temporarily clamp the said sections against spacing b ocks, substantially as described.

' In testimony whereof I ailix my signature in presence of two witnesses.

JOHN H. REEVES.

Witnesses H. P. J ONES, CHAS. O. KILPATRIOK.

alined sections 1 and 2 of the several 

